diff --git a/nflg-mobilebroken-admin/src/main/java/com/nflg/mobilebroken/admin/controller/TicketController.java b/nflg-mobilebroken-admin/src/main/java/com/nflg/mobilebroken/admin/controller/TicketController.java
index c270990a..cedcf456 100644
--- a/nflg-mobilebroken-admin/src/main/java/com/nflg/mobilebroken/admin/controller/TicketController.java
+++ b/nflg-mobilebroken-admin/src/main/java/com/nflg/mobilebroken/admin/controller/TicketController.java
@@ -705,7 +705,7 @@ public class TicketController extends ControllerBase {
             for (ChatMessageVO messageVO : messageVOS) {
                 if (Objects.equals(messageVO.getSenderId(), userId) || readeds.contains(messageVO.getId())) {
                     messageVO.setReaded(true);
-                } else {
+                } else if(Objects.nonNull(messageVO.getId())){
                     notReadeds.add(messageVO.getId());
                 }
             }
diff --git a/nflg-mobilebroken-cfs-app/src/main/java/com/nflg/mobilebroken/cfs/controller/TicketController.java b/nflg-mobilebroken-cfs-app/src/main/java/com/nflg/mobilebroken/cfs/controller/TicketController.java
index ce73e7a7..04807717 100644
--- a/nflg-mobilebroken-cfs-app/src/main/java/com/nflg/mobilebroken/cfs/controller/TicketController.java
+++ b/nflg-mobilebroken-cfs-app/src/main/java/com/nflg/mobilebroken/cfs/controller/TicketController.java
@@ -325,7 +325,7 @@ public class TicketController extends ControllerBase {
             for (ChatMessageVO messageVO : messageVOS) {
                 if (Objects.equals(messageVO.getSenderId(), userId) || readeds.contains(messageVO.getId())) {
                     messageVO.setReaded(true);
-                } else {
+                } else if(Objects.nonNull(messageVO.getId())){
                     notReadeds.add(messageVO.getId());
                 }
             }